Peachtree audio Grandpre

YJ, I have the GP as well, I have had it for about a month. I figured out how to get it going on my Mac Book pro, not too difficult however it did not like Pure Music, kept stopping after 3 or 4 songs. I ditched PM and I am now using the trial version of Amarra and they seem to like each other just fine. My real problems started when I first hooked the GP up with my system and I kept getting hum through the speakers and my mono blocks power meter went crazy. To make a very long story short, after trying all the usual tricks to eliminate a ground loop I have to use both XLR and RCA connections to my amps to eliminate the hum and make my mono blocks happy...Go figure?

Chairman, I had the same problem with my GP when I first got it hooked up to my amp! And I arrived at the same solution! It was definitely a ground problem with the XLR, because simply tying any of the RCA grounds between the GP and power amp together solved the issue. But that was an iffy B&K amp, and I've since upgraded to a Bryston 4BSST2 (and moved from demo Kimber to higher end AQ cables) , and I have no problems with XLR and I don't have to ground the two thru RCA.

I was curious about Zugisland's driver issue, because my GP was generating severe popping thru the USB input regardless of Windows or Mac computer, and I was curious to hear of any other instances and potential solutions.

YJ, nice upgrade! I am glad you figured out how to get your GP going with your earlier amp! I am happy with my amps and don't plan on changing them anytime soon so I guess I am stuck with the 2x connection.
Fortunately I have not had the popping noise so I can't help you out there.

Happy listening